1987 Jeep Wrangler Engine For Sale: A Comprehensive Guide to Reviving Your Classic YJ

1987 Jeep Wrangler Engine For Sale: A Comprehensive Guide to Reviving Your Classic YJ jeeps.truckstrend.com

The 1987 Jeep Wrangler YJ holds a special place in the hearts of off-road enthusiasts and classic vehicle collectors alike. As the inaugural year for the iconic Wrangler nameplate, the ’87 YJ introduced a new era of Jeep design while retaining its rugged capability. However, time, mileage, and tough terrain can take their toll on even the most durable components, especially the engine. For many owners, finding a reliable "1987 Jeep Wrangler Engine For Sale" becomes a crucial step in restoring, maintaining, or upgrading their beloved YJ, ensuring it continues to conquer trails and turn heads for years to come. This guide will delve into everything you need to know about sourcing, evaluating, and purchasing an engine for your 1987 Jeep Wrangler.

Understanding the Heart of the 1987 YJ: Engine Options

1987 Jeep Wrangler Engine For Sale: A Comprehensive Guide to Reviving Your Classic YJ

The 1987 Jeep Wrangler YJ was offered with two primary engine choices, both renowned for their robust construction and relatively simple mechanics. Understanding these options is the first step in your engine search:

• The AMC 2.5L (150 cu in) Inline-4 Cylinder: This four-cylinder engine, often referred to as the "Iron Duke" (though technically a different engine, the AMC 2.5L inherited a similar reputation), was a workhorse designed for efficiency and reliability. Producing around 117 horsepower and 135 lb-ft of torque, it was adequate for daily driving and light off-roading, particularly when paired with a manual transmission. It’s known for its longevity and ease of maintenance.
• The AMC 4.2L (258 cu in) Inline-6 Cylinder: The legendary "258" six-cylinder engine was the more powerful option, delivering approximately 112-120 horsepower and a more substantial 210 lb-ft of torque. While its horsepower figures might seem similar to the 2.5L, its higher torque output made it a favorite among off-roaders for its low-end grunt, ideal for crawling over obstacles. Most 1987 4.2L engines were carbureted (BBD or Carter BBD), though some later models or swapped engines might feature throttle body injection (TBI) upgrades. This engine is highly regarded for its bulletproof nature and potential for performance modifications.

Both engines, while carbureted in 1987, are relatively straightforward to work on, making them appealing for DIY enthusiasts and professional mechanics alike.

Why Buy a 1987 Jeep Wrangler Engine?

There are several compelling reasons why an owner might be searching for a replacement engine for their 1987 YJ:

• Engine Failure: The most common reason is a catastrophic failure of the original engine due to age, lack of maintenance, or severe operating conditions (e.g., hydro-locking, extreme overheating).
• Restoration Projects: For those undertaking a full frame-off restoration, a fresh engine is often a cornerstone of bringing the vehicle back to its former glory.
• Performance Upgrade: While less common for direct replacements, some owners might seek a more robust version of the original engine (e.g., a fully rebuilt 4.2L with performance enhancements) or even consider a modern engine swap if permitted by local regulations.
• Preventative Maintenance: Some proactive owners might replace a high-mileage engine showing signs of wear before it fails completely, especially if they plan on extensive off-road use.

Where to Find a 1987 Jeep Wrangler Engine For Sale

Locating the right engine requires knowing where to look. Your options range from budget-friendly used units to professionally remanufactured powerhouses:

• Online Marketplaces: Websites like eBay Motors, Craigslist, Facebook Marketplace, and dedicated Jeep forums (e.g., JeepForum.com, WranglerForum.com) are excellent starting points. You’ll find everything from complete running engines to core units for rebuilding.



• Specialty Salvage Yards: "Jeep-only" or off-road oriented salvage yards often stock a wide range of used engines and parts for classic Wranglers. These can be goldmines for finding specific components.
• Engine Rebuilders/Remanufacturers: Companies like Jasper Engines, ATK Engines, and local reputable engine machine shops specialize in rebuilding and remanufacturing engines. This is often the safest bet, as these engines typically come with a warranty and are built to exacting standards.
• Local Auto Parts Stores: Some larger auto parts chains (e.g., NAPA, O’Reilly Auto Parts) can order remanufactured engines through their supplier networks.
• Word of Mouth: Don’t underestimate the power of local Jeep clubs and enthusiasts. Someone might know of an engine for sale or a reputable builder.

Types of Engines Available

When searching, you’ll encounter different classifications of engines, each with its own price point and level of risk:

• Used Engines: These are pulled directly from donor vehicles. They are the least expensive option but carry the highest risk. Their condition can vary wildly, from barely used to needing a full rebuild.
• Rebuilt Engines: A local mechanic or machine shop disassembles the engine, inspects components, replaces worn parts (bearings, rings, gaskets, seals), and reassembles it. Quality can vary based on the rebuilder’s expertise.
• Remanufactured Engines: This is a more comprehensive process than a typical rebuild. Remanufactured engines are completely disassembled, all components are thoroughly inspected, machined to factory specifications (or better), and all wear items are replaced with new parts. They often come with a substantial warranty and are considered a "like-new" product.
• New Crate Engines: While rare for a specific 1987 model year engine, some specialized builders might offer "new" crate versions, often with modern upgrades (like fuel injection) but designed to fit the original vehicle. More commonly, new crate engines are modern V8 or V6 swaps.

What to Look For When Buying a 1987 Jeep Wrangler Engine

Thorough inspection is crucial, especially for used engines:

• Visual Inspection: Look for obvious damage, cracks in the block or head, signs of severe rust, or bent components. Check for fresh paint – sometimes used to mask issues.
• Fluid Contamination: Examine the oil for signs of coolant (milky appearance) or excessive metal flakes. Check the coolant for oil residue.
• Compression Test (if possible): This is vital for used engines. Consistent compression readings across all cylinders indicate good internal health. Inconsistent or very low readings suggest worn rings, valves, or head gasket issues.
• Oil Pressure (if possible): If the engine can be run, check for stable oil pressure.
• Mileage/History: While often hard to verify for used engines, any available records are a bonus.
• Inclusions: Confirm what accessories come with the engine (carburetor, intake/exhaust manifolds, alternator, power steering pump, distributor, etc.). These can add significant cost if purchased separately.
• Warranty: Always ask about a warranty, especially for rebuilt or remanufactured engines. Understand what it covers and for how long.
• Paperwork: Ensure the seller can provide clear title or proof of ownership, especially for complete vehicles or engines from reputable salvage yards.

Important Considerations Before Purchase

• Compatibility: Ensure the engine is indeed for a 1987 YJ, especially concerning bell housing patterns and motor mount locations if you’re swapping from a 2.5L to a 4.2L or vice-versa.
• Ancillary Components: Does the engine come complete, or will you need to source a carburetor, ignition system, exhaust, and other accessories? Factor these costs into your budget.
• Installation Costs: If you’re not doing the swap yourself, get quotes from reputable mechanics. Installation can be as expensive as the engine itself.
• Emissions & Legality: Check your local and state regulations regarding engine swaps and emissions testing. While older vehicles often have more lenient rules, it’s crucial to be compliant.

The Buying Process: A Step-by-Step Guide

1. Research & Budget: Determine which engine (2.5L or 4.2L) best suits your needs and set a realistic budget for the engine itself, shipping, and installation.
2. Locate Sellers: Use the resources mentioned above to find potential engines.
3. Contact & Inquire: Ask detailed questions about the engine’s history, condition, included components, and warranty. Request photos or videos.
4. Inspect (In-Person if Possible): If feasible, inspect the engine personally. Bring a friend with mechanical knowledge if you’re unsure.
5. Negotiate: Don’t be afraid to negotiate the price, especially for used engines.
6. Secure Payment: Use secure payment methods. Avoid wire transfers for unknown sellers. For large purchases, consider an escrow service.
7. Arrange Transport: Plan for how the engine will be transported. Engines are heavy and require proper lifting and securing.

Potential Challenges and Solutions

• Scams: Be wary of deals that seem too good to be true. Verify seller credibility, and never pay full price upfront without inspecting the product.
• Hidden Issues: Even with a thorough inspection, some problems might not be apparent until the engine is installed and running. This is where a good warranty is invaluable.
• Shipping Costs: Engine shipping can be expensive, especially for long distances. Get clear quotes beforehand.
• Installation Complexity: Swapping an engine is a significant undertaking. If you lack the experience, professional installation is recommended to avoid costly mistakes.

Tips for a Successful Engine Swap/Installation

• Professional Help: If you’re not an experienced mechanic, consider having a professional shop handle the installation. They have the right tools, knowledge, and insurance.
• New Gaskets & Seals: Even if the engine comes with them, it’s often wise to replace all external gaskets and seals during installation to prevent future leaks.
• New Fluids & Filters: Always start with fresh oil, coolant, and a new oil filter, air filter, and fuel filter.
• Proper Break-In: Follow the manufacturer’s or rebuilder’s recommended break-in procedure for new or rebuilt engines. This is crucial for longevity.
• Inspect Ancillaries: While the engine is out, it’s a great time to inspect or replace other components like motor mounts, clutch (for manuals), radiator, hoses, and belts.

1987 Jeep Wrangler Engine For Sale: Estimated Price Guide

Please note that these prices are estimates and can vary significantly based on condition, mileage, included accessories, seller, and market demand.

Engine Type	Condition	Estimated Price Range (USD)	Key Features / Notes
AMC 2.5L Inline-4	Used (Pull-out)	$500 – $1,500	Cheapest option; condition highly variable; inspect thoroughly for wear, leaks, and internal health. May need a full rebuild.
	Rebuilt (Local Shop)	$1,500 – $2,500	Disassembled, worn parts replaced; quality depends on the rebuilder; often comes with a limited warranty.
	Remanufactured	$2,000 – $3,500	Factory-level process; completely machined, new components; typically comes with a substantial warranty (e.g., 3-year/100,000-mile); "like-new" performance.
AMC 4.2L Inline-6	Used (Pull-out)	$700 – $2,000	Popular choice due to torque; often needs carburetor work or TBI conversion; similar risks to used 2.5L.
	Rebuilt (Local Shop)	$2,000 – $3,500	Common for those seeking a reliable 258; consider upgrades during rebuild (e.g., better cam, TBI conversion readiness). Quality varies.
	Remanufactured	$2,500 – $4,500+	Best option for long-term reliability and performance; often includes improved internal components; strong warranty. Price can go higher with performance upgrades or included TBI kits.
Installation Labor	Professional	$800 – $2,000+	Varies greatly by shop rate, complexity (e.g., manual vs. auto, 2.5L to 4.2L swap), and additional parts needed (e.g., clutch, motor mounts).
Shipping Costs	Varies by Distance	$200 – $800+	Engines are heavy freight; obtain specific quotes from freight companies. Local pickup saves significantly.

Frequently Asked Questions (FAQ)

Q1: What are the common issues with the 1987 Jeep Wrangler engines?
A1: For the 2.5L, primary issues relate to its lower power output for heavier use. For the 4.2L, common issues include vacuum leaks (due to the complex vacuum system for the carburetor), carburetor tuning issues, and occasional valve train noise. Both engines are generally robust, but age and neglect are their biggest enemies.

Q2: Can I upgrade the carburetor on a 4.2L engine?
A2: Yes, it’s a very common and recommended upgrade. Popular choices include the Weber 32/36 DGEV or the Motorcraft 2100 (from a Ford 302 V8). Many owners also convert to a modern Throttle Body Injection (TBI) system for improved reliability, fuel economy, and cold starts.

Q3: Is it worth rebuilding my original 1987 YJ engine?
A3: It depends on the extent of the damage and the cost. If the block and head are in good condition (no major cracks or warpage), rebuilding can be a cost-effective option, especially if you want to retain the original engine number for authenticity. Get quotes for both rebuilding and remanufactured replacements to compare.

Q4: What’s involved in an engine swap?
A4: An engine swap typically involves disconnecting all accessories, fluids, wiring, and the transmission from the old engine, removing it, preparing the engine bay, installing the new engine, reconnecting everything, and refilling fluids. It requires specialized tools (engine hoist, stands) and mechanical knowledge.

Q5: Are parts readily available for these older engines?
A5: Yes, parts for both the AMC 2.5L and 4.2L are generally abundant. Many components are still manufactured, and the aftermarket support is excellent due to the popularity of these engines in older Jeeps.

Q6: Can I put a V8 engine in my 1987 YJ?
A6: Yes, V8 swaps (like a Chevy 350 or Ford 302) are popular but significantly more complex. They require custom motor mounts, bell housing adapters, new transmissions, cooling system upgrades, and often extensive wiring and exhaust modifications. It’s a major project requiring advanced mechanical skills and a larger budget.

Conclusion

Finding a "1987 Jeep Wrangler Engine For Sale" is more than just a transaction; it’s an investment in the longevity and spirit of an automotive icon. Whether you opt for a budget-friendly used unit, a professionally rebuilt masterpiece, or a fully remanufactured powerhouse, understanding the different types, knowing what to look for, and following a structured buying process will significantly increase your chances of a successful outcome. With the right engine, your 1987 Jeep Wrangler YJ can continue to deliver the raw, open-air adventure it was designed for, ensuring many more miles of trails, memories, and classic Jeep pride.